shuru.java

接口练习 输入 浮点数 整数 字符 字符串

package test4;
import java.io.*;
/**
 * <p>Title: test4</p>
 * <p>Description: 接口练习</p>
 * <p>Copyright: Copyright (c) 2009</p>
 * <p>Company: 0711304034</p>
 * @author 张海军
 * @version 1.0
 */

public class Shuru {
     private InputStreamReader in=new InputStreamReader(System.in);
     private BufferedReader reader=new BufferedReader(in);

     public String readString() {
            String s="";
            try {
                  s=reader.readLine();
            } catch(IOException e) {
                  System.out.println(e);
                  System.exit(0);
            }
            return s;
      }

     public char readChar() {
            char ch=' ';
            try {
                  String s=readString();
                  ch=s.charAt(0);
            } catch(Exception e) {
                  System.out.println("Error input type. The program will exit.");
                  System.exit(0);
            }
            return ch;
      }

     public int readInt() {
            String s=readString();
            int i=0;
            try {
                  i=Integer.parseInt(s);
            } catch(Exception e) {
                  System.out.println("Error input type. The program will exit.");
                  System.exit(0);
            }
            return i;
      }

     public double readDouble() {
            String s=readString();
            double d=0.0;
            try {
                  d=Double.parseDouble(s);
            } catch(Exception e) {
                  System.out.println("Error input type. The program will exit.");
                  System.exit(0);
            }
            return d;
      }

     public float readFloat() {
            String s=readString();
            float f=0.0f;
            try {
                  f=Float.parseFloat(s);
            } catch(Exception e) {
                  System.out.println("Error input type. The program will exit.");
                  System.exit(0);
            }
            return f;
      }

}